Exelon’s PECO Declares Dividends on Preferred Stock

Directors of PECO Energy Company have declared dividends on all series of preferred stock, payable November 1, 2010, to shareholders of record at the close of business on September 30, 2010.

PHILADELPHIA – Directors of PECO Energy Company have declared dividends on all series of preferred stock, payable November 1, 2010, to shareholders of record at the close of business on September 30, 2010, as follows:

Series Amount Per Share$4.68 Series D $1.17$4.40 Series C $1.10$4.30 Series B $1.075$3.80 Series A $0.95

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About Exelon

Exelon Corporation is one of the nation’s largest electric utilities with more than $17 billion in annual revenues. The company has one of the industry’s largest portfolios of electricity generation capacity, with a nationwide reach and strong positions in the Midwest and Mid-Atlantic. Exelon distributes electricity to approximately 5.4 million customers in northern Illinois and southeastern Pennsylvania and natural gas to approximately 486,000 customers in the Philadelphia area. Exelon is headquartered in Chicago and trades on the NYSE under the ticker EXC.

About PECO

Based in Philadelphia, PECO is an electric and natural gas utility subsidiary of Exelon Corporation (NYSE: EXC). PECO serves 1.6 million electric and 486,000 natural gas customers in southeastern Pennsylvania and employs about 2,400 people in the region. PECO delivered 84.3 billion cubic feet of natural gas and 38.1 billion kilowatt-hours of electricity in 2009. Founded in 1881, PECO is one of the Greater Philadelphia Region's most active corporate citizens, providing leadership, volunteer and financial support to numerous arts and culture, education, environmental, economic development and community programs and organizations. If you are a member of the media and would like to receive PECO news releases via e-mail please send your e-mail address to PECO.Communication@exeloncorp.com.